Fixed F_to_nu function
Fixed F_to_nu function

anhiga/poliastro,anhiga/poliastro,newlawrence/poliastro,poliastro/poliastro,newlawrence/poliastro,Juanlu001/poliastro,newlawrence/poliastro,anhiga/poliastro,Juanlu001/poliastro,Juanlu001/poliastro